Omar Khayyam

Although very little is known about Omar Khayyam’s personal life, it is generally believed that he was married and fathered two children; a son and a daughter.

He was a Sufi Muslim and greatly revered Prophet Muhammad. In his philosophical work ‘al-Risālah fil-wujūd’ (Treatise on Being) he wrote that all things come from God. His poems also reveal that he was a thoughtful man, troubled by the uncertainty of life and man’s relationship with his creator.

Omar Khayyam died on 4 December 1131, in Nishapur and was buried at the same spot that he had shown to his student, Khwájah Nizámi of Samarkand. The Mausoleum of Omar Khayyam was reconstructed on the site by Hooshang Seyhoun in 1963.

Omar Khayyam, whose full name was Ghiyath al-Din Abu'l-Fath Umar ibn Ibrahim Al-Nisaburi al-Khayyami, was born on 18 May 1048 in Nishapur, located at the foot of Binalud Mountain in northeastern Iran. A great trading post, it served as the capital city of Seljuq dynasty at the time of his birth.

Little is known about his family background. From their title ‘Khayyami’ it has been assumed that he was born into a family of Muslim tentmakers. It is, however, not known if his father, Ibrahim Khayyami, pursued the family trade.

While many assume that Ibrahim was indeed a tentmaker, some other biographers believe that he was an established physician. However, it is certain that he was aware of the importance of education and was religiously very unorthodox. Nothing is known about Omar’s mother.

Omar Khayyam received comprehensive education. One of his teachers was a Zoroastrian mathematician called Bahmanyar bin Marzban, with whom he studied science, philosophy, and mathematics. Concurrently, he studied astronomy under Khawjah al-Anbari.

He also studied scripture with Imán Mowaffak of Naishápúr. It was here that he formed close friendship with Abu Ali Hasan ibn Ali Tusi, who was later appointed Vizier to the Seljukid Empire and was known as Nizam-ul-Mulk.

According to some biographers, in 1066, after the death of his father, Omar Khayyam returned to Nishapur to settle family affairs. After two years, he left for Samarkand, a center for scholarship, located in modern-day Uzbekistan.

After traveling for three months, he reached Samarkand, sometime in 1068. There he contacted Abu Tahir, a prominent jurist, who happened to be his father’s old friend. On observing Omar Khayyam’s extraordinary talent in mathematics, Tahir employed him in his office.

In 1070, working under Tahir’s patronage, Khayyam wrote ‘Treatise on Demonstration of Problems of Algebra and Balancing’. In it, he not only classified different types of cubic equations, but also presented systematic solution to them. The work, which laid down the principles of modern-day algebra, established him as a prominent mathematician.

It is possible that Khayyam had also written another book before this; but it is now lost. From the references found in his algebra book, scholars have come to conclusion that he had discussed Pascal triangle and binomial coefficients in this lost work.

Sometime after publishing the treaties on algebra, Khayyam moved to Bukhara, possibly with an appointment at the royal court. While he was there, Jalal al-Din Malik-Shah Saljuqi became the next Seljuk emperor, with Khayyam’s old friend, Nizam-ul-Mulk, being appointed his Vizier.

Possibly in 1073, Omar Khayyam received an invitation from Malik Shah I, asking him to come to his capital at Isfahan to build an observatory for him. Accordingly, he moved to Isfahan, possibly in 1074, at an extraordinarily high salary, to lead a team of scientists.

In 1075, Omar Khayyam, along with two other scientists, produced a set of astronomical tables, entitled ‘Al-zij al-Malikshahi’, naming it after their royal patron. Unfortunately, most of the work, excepting a table of 100 fixed stars, is now lost.

At the emperor’s order, he also reformed the solar calendar, then in use in Persia. After a lot of calculation, he came to the conclusion that a year held 365.24219858156 days and that there were 8 leap years in every 33 years.

Named ‘Maleki’ after the emperor, the calendar was introduced on March 15, 1079 and was in use for a thousand years, and was later renamed as ‘Jalali Calender’. The Georgian Calendar that came into use after 500 years was based on Khayyam’s calculations.